96 voyager SE need help? Stalling issue!

Van runs great most of the time, but once in awhile it will either stall or start to stall out while driving if you put the pedal to the floor sometimes it will catch itself before stalling out. Runs great most of the time and will start right bak up after stalling? Someone said it might be the crank position sensor going bad? Wanted to get some ideas before I replaced that. Thank you for your help.

How long since a tune-up? Any trouble codes?